Matthew McConaughey, George Clooney, Julia Roberts and Rachel McAdams…IRISH! But you would be very surprised to find out who has a bit of the ‘blarney’ in them. For example, we associate Robert DeNiro as an Italian American actor…he’s actually one-quarter of Italian ancestry. His father was half-Irish and half- Italian. His mother was of French, Dutch and German ancestry. He was, however, quite close to his Italian paternal grandfather where he identifies more to. Even Charlie Sheen is not entirely filled with “Tiger Blood”, he too has Galician Spanish, Scottish and of course, Irish. Click through the photos to find out who else is of Irish Decent. Source: IMDB.com

Will Ferrell

(Photo by Charley Gallay/Getty Images for 7-Eleven)

Is of Irish descent. Will has said on the Old School DVD commentary that his nationalities are Irish and Filipin.

Steve Buscemi

(Photo by Jason Merritt/Getty Images)

Surname pronounced Buss-ehm-ee. Is of Italian and Irish-American ancestry. His mother is Irish-American.

Sharon Stone

(Photo by Jason Merritt/Getty Images)

Irish-American

Sean Patrick Flanery

(Photo by Frazer Harrison/Getty Images)

Is of Irish descent

Rose McGowan

(Photo by Frazer Harrison/Getty Images)

She is of French and Irish descent

Rose Byrne

(Photo by Jason Kempin/Getty Images)

Is of Scottish and Irish descent

Robin Tunney

(Photo by Kevork Djansezian/Getty Images)

Irish American; her father emigrated from Ireland and her mother is a first generation Irish-American.

Robert Downey Jr.

(Photo by Gareth Cattermole/Getty Images)

He is of Irish and Russian-Jewish ancestry from his father’s side and German-Jewish and Scottish descent from his mother’s side.

Pierce Received American Citizenship at the US District Court House in Los Angeles in 2004. He has dual citizenship: Irish and American. He was made a Freeman of Navan, Co. Meath, Ireland (the town he lived in until he moved to England in 1964) on 11th November 1999. His primary residence is in Malibu, California. Owns his own production company, Irish DreamTime. Its first release was The Nephew. Became an American citizen on 23 September 2004 but still plans to keep his Irish citizenship.

Peter O’Toole

(Photo by Frank Micelotta/ImageDirect/Getty Images)

Father was Irish, mother was Scottish. Was friends with fellow Irish actor Richard Harris. After Harris died, his family hoped that O’Toole would replace him as Professor Albus Dumbledore in Harry Potter and the Prisoner of Azkaban. Both he and his fellow Irish actor (and close friend), the late Richard Harris appeared in versions of ‘Gulliver’s Travels’: Harris played the 1977 film version Gulliver’s Travels and O’Toole played the Emperor of Lilliput in the 1996 TV-film version Gulliver’s Travels, where Ted Danson played Gulliver.

Paul Walker

(Photo by Kevin Winter/Getty Images)

His grandfather Paul Walker, Jr. (aka. “Irish” Billy Walker) was a professional boxer. Is of Irish descent.

Patricia Heaton

(Photo by Frederick M. Brown/Getty Images)

Irish-American

Olivia Wilde

(Photo by Toby Canham/Getty Images)

Star of ‘Tron Legacy’ and ‘House’, Olivia Wilde is Irish-American. Adopted her professional name “Wilde” after she developed a profound respect and admiration for Irish poet and writer Oscar Wilde and his body of literature.

Natascha McElhone

(Photo by Ian Gavan/Getty Images)

Her mother (Noreen) is Irish.

Mischa Barton

(Photo by Jemal Countess/Getty Images)

Is half English and half Irish

Mickey Rourke

(Photo by Frazer Harrison/Getty Images)

The ‘Iron Man 2′ star is Irish American

Michaela Conlin

(Photo by Michael Buckner/Getty Images)

Actress Michaela Conlin of Fox’s ‘Bones’. Her mother is Chinese American and father is Irish American. Michaela has one older sister. She will be seen along fellow Irishman, Matthew McConaughey in ‘The Lincoln Lawyer’.

Matthew Broderick

(Photo by Kris Connor/Getty Images)

Actor Matthew Broderick is Polish on his mother’s side and Irish on his father’s side.

Mark & Donnie Wahlberg

(Photo by Kevin Winter/Getty Images )

Mark Wahlberg and Donnie Wahlberg are of Swedish, Irish, German and French Canadian descent.

Martin Sheen

(Photo by Ethan Miller/Getty Images)

His mother, Mary Ann Phelan, was an Irish immigrant with IRA connections, and his father, Francisco Estevez, was a Spaniard who came to the U.S. by way of Cuba.

Mandy Moore

(Photo by Frazer Harrison/Getty Images)

Singer & Actress, Mandy Moore is of Irish and Cherokee descent on her father’s side and of English descent on her mother’s side.

Maggie Q

(Photo by Mark Mainz/Getty Images)

Star of CW’s ‘Nikita’, Maggie Q is of Vietnamese and Irish-American descent. Raised in Hawaii. Was a fashion model and television personality before she became a movie actress.

Lindsay Lohan

(Photo by Stephen Dunn/Getty Images)

Is of Italian and Irish descent

Linda Cardellini

(Photo by Charley Gallay/Getty Images)

Actress Linda Cardellini is of Italian/Irish descent

Liam Neeson

(Photo by Jason Merritt/Getty Images)

Was a boxer as a teen-ager in Northern Ireland, which resulted in getting his nose broken at the age of 15. Nevertheless, he went on to win the Irish Youth Championship. A brief blackout after one of his fights, however, caused him to give up the ring for good. In an interview with the BBC, he said that Northern Irish Protestant minister Ian Paisley influenced his decision to become an actor. He use to sneak into the church in his hometown of Ballymena and watch Mr. Paisley preach. “He had a magnificent presence and it was incredible to watch this six foot-plus man just bible-thumping away. It was acting but it was also great acting and stirring too.”.

Lauren Graham

(Photo by Kevin Winter/Getty Images)

Actress Lauren Graham has Irish roots. Has a half sister, Maggie and a half brother, Chris. First paying job was in high school, in a video about Planned Parenthood.

Laura Prepon

(Photo by Evan Agostini/Getty Images)

She is of half-Russian-Jewish and half-Irish-Catholic descent.

Kristen Bell

(Photo by Brian Ach/Getty Images for IMG)

Star of “Forgetting Sarah Marshall’, Kristen Bell is of Irish and Polish descent

Krista Allen

(Photo by Ethan Miller/Getty Images)

Actress Krista Allen is of Portuguese heritage on her mother’s (Katherine Mary Raposa) side and Irish heritage on her father’s (Daldon Earl Allen) side.

Kevin Connolly

(Photo by Jim McIsaac/Getty Images)

Star of ‘HBO’s Entourage’, actor Kevin Connolly is of Irish ancestry

Katherine Heigl

(Photo by Ian Gavan/Getty Images)

She is half Irish and half German.

Kate Walsh

(Photo by Christopher Polk/Getty Images for Rolling Stone)

Star of ABC’s ‘Private Practice’, Kate Walsh’s mother is Italian and her father is Irish

Julia Roberts

(Photo by Chris Jackson/Getty Images)

She has Irish ancestry

Josh Hartnett

(Photo by Charley Gallay/Getty Images for Grey Goose)

The ‘Pearl Harbor’ Star is of Swedish and Irish descent

Jonathan Rhys Meyers

(Photo by Frantzesco Kangaris/Getty Images)

Star of the ‘Tudors’, actor Jonathan Rhys Meyers is a good friend of fellow Irish actor Stuart Townsend. The two of them protested at the “Save Tara Hill Campaign” in 2006.

John Travolta

(Photo by Kevin Winter/Getty Images)

Is of Italian descent on his father’s side and Irish descent on his mother’s side.

John Slattery

(Photo by Francois Durand/Getty Images)

The ‘Mad Men’ Star is Irish-American

John C. Reilly

(Photo by Francois Durand/Getty Images)

Born to an American father (of Irish ancestry) and a Lithuanian mother. He is the fifth of six children.

John C. McGinley

(Photo by Frederick M. Brown/Getty Images)

Actor John C. McGinley is Irish-American

Jennifer Beals

(Photo by Frederick M. Brown/Getty Images)

Has an African-American father and an Irish mother. Daughter of Alfred Beals (an African-American grocery store owner) and Jeanne Cohen (an Irish elementary school teacher).

Actor James Earl Jones is of African-American, American Indian and Irish ancestry. His paternal great-great-grandmother, Parthenia Connolly, was a native of Ireland who worked as an indentured servant. She married a former slave named Brice. Because Brice had no surname of his own, he took his wife’s name Connolly. His maternal grandmother, Maggie Anderson, was part Choctaw Indian. He also has Cherokee ancestry.

Jack Nicholson

(Photo by Kevin Winter/Getty Images)

His mother, June Nicholson, was of Irish and Dutch descent. He never knew his father and was raised by his grandparents. He was led to believe that June was his older sister and his grandparents were his parents. It was not until 1974 when a Time magazine reporter researched his life that he learned the truth. An Italian immigrant named Donald Furcillo who was married briefly to June claimed to be his father. But Nicholson chose not to investigate further.

Heather Graham

(Photo by Chung Sung-Jun/Getty Images)

‘The Hangover’ star is of Irish Catholic extraction

George Clooney

(Photo by Jason Merritt/Getty Images)

Is of Irish-American descent

Emmy Rossum

(Photo by Jemal Countess/Getty Images)

Is Dutch and Scot-Irish

Edward Burns

(Photo by Amy Sussman/Getty Images)

Is an Irish-American

Ed O’Neill

(Photo by Frederick M. Brown/Getty Images)

Star of ‘Modern Family’ & Married With Children’, Ed O’Neil is an Irish-American…Sofía Vergara is from Columbia, not Irish.

Dominic West

(Photo by Vince Bucci/Getty Images)

Actor Dominic West is Irish-American

Dominic Purcell

(Photo by Michael Buckner/Getty Images)

His mother is Maureen (she’s Irish).

Dermot Mulroney

(Photo by Alberto E. Rodriguez/Getty Images)

Is of predominantly Irish ancestry. All of his siblings have traditional Irish names

Denis Leary

(Photo by Brendan Hoffman/Getty Images)

Irish-American

Daniel Day-Lewis

(Photo by Dave Hogan/Getty Images)

Moving to County Wicklow, Ireland, he assumed Irish citizenship (1993). Always quiet and introverted, he said that he was not popular in school and was mocked as an outsider while growing up in England, partially because he was of half-Jewish/half-Irish stock. The upside was that, instead of socializing, he developed a rich fantasy life that later helped him to delve so deeply into his characters. Holds dual citizenship – British and Irish.

Dane Cook

(Photo by Noel Vasquez/Getty Images)

Is of Irish heritage.

Colin Farrell

(Photo by Gareth Cattermole/Getty Images For Dubai International Film Festival)

Son of Irish football player, Eamon Farrell. Auditioned to become a member of the Irish boyband, Boyzone, but was turned down. Daredevil marks the first time he has been able to use his own Irish accent in an American movie.

Cillian Murphy

(Photo by Kevin Winter/Getty Images for AFI)

Actor Cillian Murphy of ‘Batman Begins’ & ‘The Dark Knight’. As of 2006 he is the most nominated Irish Actor at the Irish Film and Television Awards with 6 nominations. He is fluent in French and Irish.

Chuck Norris

(Photo by Frazer Harrison/Getty Images)

Both his parents were half Irish and half Cherokee.

Christopher Nolan

(Photo by Neilson Barnard/Getty Images for WGAw)

Is of Irish descent.

Christina Ricci

(Photo by Jemal Countess/Getty Images)

Her paternal grandfather was of Italian descent. The remainder of her ancestry is Scots-Irish.

Christian Slater

(Photo by Miguel Villagran/Getty Images)

Actor Christian Slater is of English/Irish descent.

Chris Evans

(Photo by Kevin C. Cox/Getty Images)

Is of Irish and Italian descent.

Charles Durning

(Photo by Michael N. Todaro/Getty Images)

Charles Durning is Irish-American

Channing Tatum

(Photo by Alberto E. Rodriguez/Getty Images)

Is of Native American, Irish, and French descent.

Catherine Zeta-Jones

(Photo by Neilson Barnard/Getty Images)

Mother is Irish, father is Welsh.

Catherine O’Hara

(Photo by Evan Agostini/Getty Images for The National Board of Review)

Third generation Irish/Canadian/Catholic.

Catherine Keener

(Photo by Sonia Recchia/Getty Images)

Of Irish and Lebanese descent.

Carla Gugino

(Photo by Jason Merritt/Getty Images)

Is of Italian, Irish, and English descent.

Burt Reynolds

(Photo by Kevin Winter/Getty Images)

His father was of Irish-Cherokee Indian descent, his mother was of Italian descent.

Brendan Gleeson

(Photo by Jason Merritt/Getty Images)

He played Irish leader Michael Collins in The Treaty. He later had a supporting role in the biopic Michael Collins.

Bradley Cooper

(Photo by Kiyoshi Ota/Getty Images)

His father, Charlie Cooper, is of Irish heritage and his mother, Gloria Cooper (formerly Campano) is of Italian heritage.

Billy Bob Thornton

(Photo by David Livingston/Getty Images)

His father is of Irish ancestry, while his mother is half Choctaw Indian and half Italian.

Bill Murray

(Photo by Jed Jacobsohn/Getty Images)

Irish-American

Ben Stiller

(Photo by Astrid Stawiarz/Getty Images)

Mother, Anne Meara is Irish-American

Ashton Kutcher

(Photo by Brian Harkin/Getty Images)

Actor Ashton Kutcher is mostly Irish American descent. He also has some Native American and Bohemian (the source of his surname) ancestry.

Anthony Michael Hall

(Photo by Scott Halleran/Getty Images)

Is of Irish and Italian heritage

Anne Hathaway

(Photo by Kevin Winter/Getty Images for AFI)

Is of French, Irish, German and Native American descent

Anna Kendrick

(Photo by Jason Merritt/Getty Images)

The star of “Up In The Air” is of Irish descent

Anna Friel

(Photo by Neilson Barnard/Getty Images)

Actress Anna Friel from the show “Pushing Daisies” Is of Irish descent.

Alyson Hannigan

(Photo by Charley Gallay/Getty Images for PCA)

Irish-American on her father’s side and Jewish-American on her mother’s side, Hannigan was raised in the Jewish faith.

Alison Lohman

(Photo by Francois Durand/Getty Images)

Is of Irish descent

Alex O’Loughlin

(Photo by Frazer Harrison/Getty Images)

Is of Irish and Scottish descent

Adrian Grenier

(Photo by Christopher Blumenshine/Getty Images for GQ)

Native American and Irish parentage

Brian Austin Green & Megan Fox

(Photo by Vittorio Zunino Celotto/Getty Images)

He is of Irish, Scottish, Hungarian and Cherokee descent. Megan Fox has Irish, French and Cherokee ancestry. Her Irish ancestors were from County Tipperary, one of the first Irish counties to be established in the 13th century.

Dakota & Elle Fanning

(Photo by Alberto E. Rodriguez/Getty Images)

Actress Dakota Fanning and actress Elle Fanning. Their last name “Fanning” is of Irish origin. Also, they are of half-German descent.

Ann, John & Joan Cusack

(Photo by Matt Carmichael/Getty Images)

Siblings (L-R) Ann, John, and Joan Cusack are Irish-American. The name Cusack is not Slavic as many may believe. It is a Norman name, brought to Ireland when the Normans invaded in 1169. “Cussac” is a city in South Central France.

Emily & Zooey Deschanel

(Photo by Michael Buckner/Getty Images)

Actresses Emily Deschanel (L) and Zooey Deschanel. Their paternal grandfather was French and the remainder of their ancestry is Irish American.

Matt Dillon

(Photo by Brendan Hoffman/Getty Images)

Irish American

Kevin Dillon

(Photo by Frazer Harrison/Getty Images)

Irish American

Ben & Casey Affleck

(Photo by Claire Greenway/Getty Images)

(L-R) Actor/Director Ben Affleck and actor Casey Affleck’s mother is Irish and father is Scottish.

Kieran Culkin & Macaulay Culkin

(Photo by Peter Kramer/Getty Images)

Actors Kieran Culkin and Macaulay Culkin are of Irish descent.

Kieran Culkin & Rory Culkin

(Photo by Teresa Barbieri/Getty Images)

Kieran Culkin & Rory Culkin are of Irish descent.

Luke, Owen and Andrew Wilson

(Photo by Vince Bucci/Getty Images)

(L-R): Director Andrew Wilson and his brothers, actors Luke and Owen Wilson are of Irish descent.

The Baldwin Brothers

(Photo by Frederick M. Brown/Getty Images)

…are of Irish and French descent. They are frequently referred to as Irish-American and, although both of their parents have Irish heritage, they are not entirely Irish. Their father was half-English and their mother’s side is primarily French (only one-quarter Irish).